129607655 has 4 divisors (see below), whose sum is σ = 155529192. Its totient is φ = 103686120.

The previous prime is 129607651. The next prime is 129607727. The reversal of 129607655 is 556706921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556706921 = 37 ⋅15046133.

It is not a de Polignac number, because 129607655 - 2² = 129607651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129607651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12960761 + ... + 12960770.

It is an arithmetic number, because the mean of its divisors is an integer number (38882298).

Almost surely, 2^129607655 is an apocalyptic number.

129607655 is a deficient number, since it is larger than the sum of its proper divisors (25921537).

129607655 is an equidigital number, since it uses as much as digits as its factorization.

129607655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25921536.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 129607655 is about 11384.5357832456. The cubic root of 129607655 is about 506.0695626840.

The spelling of 129607655 in words is "one hundred twenty-nine million, six hundred seven thousand, six hundred fifty-five".